The photos, which were published by The Telegraph, MailOnline, and TMZ, showed the trio arriving at Heathrow with at least 13 pieces of luggage. The MailOnline identified another traveller as Sandra Bazan, Tyler's girlfriend.

Dooley and her sons, who live in Oregon, previously said they had not seen Markle in 20 years and had not received an invitation to the royal wedding.

Tracy Dooley also operates a personal blog on Facebook titled "Royal Wedding with The Dooley Markles," where she posts news articles related to Markle and Prince Harry, and photos of herself.

The blog, which was still available on Tuesday afternoon, has since been taken down.

On Tuesday, Dooley wrote on the blog: "Just glad to have landed safely and hoping for Tom senior to be well, healthy, and happy."

It is an apparent reference to Meghan Markle's father Thomas, who has reportedly pulled out of the wedding after admitting to accepting money for staged paparazzi photos, and suffering a heart attack, in the run-up to the event.

On Monday, both Tracy and Tyler updated their personal Facebook profiles with news of their arrival alongside photos of London landmarks such as the London Eye, Palace of Westminster, and Imperial War Museum.

Tyler's Facebook profile was unavailable as of Wednesday afternoon, but Tracy's remained active.

The Telegraph and MailOnline also reported that the Dooleys were expected to help cover the royal wedding on TV, although details of the network and show remain unclear.